| (19) |
 |
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(11) |
EP 0 783 017 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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15.10.1997 Bulletin 1997/42 |
| (43) |
Date of publication A2: |
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09.07.1997 Bulletin 1997/28 |
| (22) |
Date of filing: 10.12.1996 |
|
| (51) |
International Patent Classification (IPC)6: C08J 9/14
// C08L75:04 |
|
| (84) |
Designated Contracting States: |
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AT BE CH DE DK ES FR GB IT LI PT SE |
| (30) |
Priority: |
22.12.1995 US 577577
|
| (71) |
Applicant: Bayer Corporation |
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Pittsburgh, PA 15219-2502 (US) |
|
| (72) |
Inventors: |
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- Werner, Joachim
Bethel Park, PA 15102 (US)
- Kane, Scott A.
Wellsburg, WV 26070 (US)
- Mortimer, Charles E.
Tarentum, PA 15084 (US)
- Doerge, Herman P.
Pittsburgh, PA 15237 (US)
- Boonstra, Eric F.
Oakdale, PA 15071 (US)
|
| (74) |
Representative: Pettrich, Klaus-Günter et al |
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c/o Bayer AG,
Konzernbereich RP
Patente und Lizenzen
51368 Leverkusen
51368 Leverkusen (DE) |
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| |
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| (54) |
Azeotrope-like compositions of 1,1,1,3,3-pentafluoropane and 2-methyl butane |
(57) Azeotropic compositions made up of from about 65 to about 81% by weight of 1,1,1,3,3-pentafluoropropane
and from about 19 to about 35% by weight of 2-methyl butane have been found to be
particularly useful as blowing agents for the production of polyurethane foams.